Improvement in rolling-mills



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3 Sheets S-heetT,

a. A. CHALFANT &. I. HAHN.

N'o.I 59,078.

Bolling-Mills Patented Jan. 26,1875,-

-- WITH 55 5 ES 3Sheets--Sheet3. G. A. CHALFANT 81!. HAHN.

Rolling-Mills. $10,159,078 v Patentedlan.26,l'8 75-.

UNI ED STATES PATENT OFFICE.

GEORGE A. OHALFANT, O-F ETNA, AND IGNATIUS HAHN, or PITTSBURG, PENNSYLVANIA.

IMPROVEMENT m ROLLING-MILLS.

Specification formin g part offLetters'Pate'nt No. 1 59,0781, dated January 26, 1875; application filed October 6,1874.

To all'whom it may concern.-

Be it known that-vie, GEORGE A. CHAL- FANT, of Etna, and IeNATr s HAHN, of Pittsburg, in the county of Allegheny and State of Pennsylvania,- have invented anew anduseful'Improvement in Rolling-Mills; and we do hereby declare the followingto be a full,-clear,

and'exact description thereof, reference being had to theaccompauying drawingforming part of this specification, in which- Figure 1 is an'end elevation of our improved rolling-mill. Fig. 2 is a front view. Fig. 3 is an end view, and Figs. 4 and 5 are views of a hangs in the collars e, by meansof the rods f,

holders g, and housing-screws h. The housing-screws, hare threaded, and pass through the threaded boxes 0. The rods f are attached to the'holder g, and pass through the housing 11 by means of suitable openings. Mounted,

oil the upper end of the screws h are the pinions h, and extending from the hand-wheel in through the bearing h is, a shaft, n, car- .rying bevel-pinionso' which .mesh, into the pinions h By turning the hand wheel m the roll d will be raised or lowered in the stationary boxes e by the screws h. The middle 'roll'i is mounted on the hands j", which are sustained by bolts or rods k, extendingnp from the cross-heads l, the latter being mounted on a shaft, m, which is situated below the housings. Looselyattached to the shaft m are levers n, which have their fulcrumsat n, and are provided with counter-weights 0 at their outer ends. These weights counterbalance pass in whose plane they' the roll 1 just sufliciently to cause it to follow the top roll, d, in its upward adjustments. This counter-balance is s'ufl'iciently nice to cause the roll ii to be thrown down by a slight pressure, so that when the bar or plate is fed between it and the upper roll itwill immediately be forced down on the lower one.

For the purpose of gaging the distance between the rolls of each vertical pair of rolls with respect to the width of the bars or plates,

we have arranged ashatt with right and left hand thread g, which extends :through the nuts of the vertical roll-bearings h, and then by means of the pinion k, mounted on its end,- com'municating by idlers l with the pinions mounted ontlie. endstof similar. right and.

left hand screws 6, passing through the lower bearings of the same pair of rolls, and the upper and lower bearings of the opposite pair of vertical rolls, the power from the shaft g is thus communicated to the other. three shafts i. The adjustment is made by means of a lever placed on a squared end of the shaft 9;

By turning the lever in the desired direction the vertical rolls are-caused to approach or reoede: from each other.

Each vertical roll is divided into two rolls, an upper and. a-lower one, whiohniove in opposits directions, sothat while the lower ones are feeding between the middle and lower horizontal rolls the upper ones will be drawing out the pass from between the middle and theupper rolls.

' -Wewill now explain how this is accomplished. We mount a' large-spur-wheel, p, on the extendedvend of the shaft-of the lower roll, 10; and 'on-- the ends of each of the shafts b we mount a spur-wheel, p,

meshing into. the spur-wheel p We divide.

the vertical rolls in two, f and f. The upper ones, f, are rigidly attached to the solid shafts e, and are turned by bevelgear wheels a, mounted on the shafts I), which mesh 'into and turn bevel-wheels. don the upper ends of the shafts c. The shafts e and c of each roll pass through a sliding frame, h, which are caused to travel back and, forth in the ways h by the operation of the screws aud t, which effect the lateral ad justment of the vertical rolls. The spur-wheels c are moved on their shafts b by the yokes h,

which extend up from the frames h The are provided with bevel-gear wheels 6 at the lower ends. Surrounding the lower ends of the solid shafts e are hollow'shafts 0?, which carry the lower roll, f. The hollow shafts are provided at their lower ends with bevel-gear wheels (2 This construction is followed. in the vertical rolls on one side of the machine. At the other side of the machine the solid shaft e is stepped in the hollow shaft, and the hollow shaft 6 is continued down through the bearing, and is provided with a bevel-gear wheel, a". Mounted on the standards e" is a shaft, e, on the ends of which are placed bevel gear wheels 6 The front wheel 0 meshes into the wheels 0 and 0 so as to turn their shafts e and e in opposite directions. The rear wheel 6 meshes into the wheel a, and turns the rear shaft, 6, and roll f. This arrangement causes the lower rolls, f, to turn always in one direction, and the upper rolls, 1, in the opposite direction. We have, therefore, reverse-moving'vertical rolls, the direction of their movement being the direction re l1luired by the pass between the horizontal re s.

Whenthe nature of the work to be done permits it we construct our mill in a more simple manner by omitting the vertical rolls at the discharge side of the upper and lower pass and retaining ,them at the feed side. This modification is shown in Figs. 3 and 4. Here the vertical rolls are driven by spurwheels 19, keyed to the extended shaft'of the bottom roll, 1). This wheel meshes into the idle-wheel, p, which turns directly the wheel 9 mounted on the-end of the horizontalshaft 1) of one pairof vertical rolls, and indirectly, by means of the wheel 1), the wheel 10, which is mounted upon the end of the. horizontal shaft b of the other pair of vertical rolls. This arrangement, it will be evident, causes the vertical rolls f and f to turn in the direction of the feed on their respective sides of the horizontal rolls. This modification is adapted for rough work, there being vertical rolls at the feed side only of the upper and lower pass.

The operation of this machine is evident, its purpose being to save the necessity ofidle passes. The plate or bar being passed through the lower rolls is carried.- up and placed in between the top and middle rolls for return. The toproll turns in opposite direction to the bottom roll by the friction of the middle one or by gearing.

It is evident to the skilled mechanic that the mechanical devices andarrangements are for transmitting power to the vertical rolls for thepur'poseof causing them to move in reverse directions, and may be altered by the use of" friction-gearing, belting, &c.

The middle or the upper horizontal roll may be the fixed roll, if desired. In the first case the two outer rolls would have to be mounted in adjustable boxes, and in the lat ter case the lower roll only would require to be so mounted. The changes and manner of working them are well known to the'skilled construct-er of rolling-mills.

What we claim as our invention, and desire to secure by Letters Patent, is-

The combination of the following parts: first, the non-reversin g power-driven horizontal rolls (1, i, and 12, forming a direct and a return pass; second,'the non-reversin g vertical rolls arranged in pairs on, both sides of the horizontal rolls, in the plane of each pass, and turning in the direction of ,the pass in whose plane they stand; and, third, devices for turning the, vertical rolls by power from the power-shaft, for the purposes described.

In testimony whereof, we, the said GEORGE A. CHALFANT and Iomzrws HAHN, have hereunto set our hands.

GEORGE A. OHALFANT. IGNAIHUS HAHN. Witnesses:

FRANCIS Tonannon, JAB. R. DABBAGH. 

